Orthodontic retainer



FIG. 1 is a rear perspective of an orthodontic retainer showing my new design. The broken line showing of a patient's dental anatomy is included for the purpose of illustrating an environment that forms no part of the claimed design.

FIG. 2 is a front perspective view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is top view thereof.

FIG. 5 is a right side elevational view thereof.

FIG. 6 is a left side elevational view thereof.

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a bottom view thereof. 

The ornamental design for an orthodontic retainer, as shown and described. 